Sewing machine



FIG. 1 is a right front perspective view of a sewing machine showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a left front perspective view thereof.

The broken lines are shown for illustrative purposes only and form no part of claimed design. 

CLAIM The ornamental design for a sewing machine, as shown and described. 